SUBSONIC
- noting or pertaining to a sound wave with a frequency below the audio-frequency range
- noting or pertaining to a speed less than that of sound in air at the same height above sea level
- moving at a speed less than that of sound [adj]
SCRABBLE® is a registered trademark, and all intellectual property rights in and to the game of Scrabble® are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, which is a subsidiary of Mattel Inc. scrabble-solver.com is not affiliated with SCRABBLE®, Mattel, Spear, or Hasbro in any way.